Question

If an energy of an electron in 3rd orbit is -E. What is the energy of an electron
i) 1st bohr orbit
ii) 2nd bohr orbit .

Answer 1

$$\begin{gathered} Energyofanelectron=\frac{-2.18\times {10}^{-18}}{n}\times Z \\ IfZ=1andn=3 \\ \frac{-2.18\times {10}^{-18}}{3}\times 1=-E \\ -0.7267\times {10}^{-18}=-E \\ FirstBohrorbiitenergy \\ \frac{-2.18\times {10}^{-18}}{1}\times 1=-3E \\ SecondBohrorbitenergy \\ \frac{-2.18\times {10}^{-18}}{2}\times 1=-2E \end{gathered}$$